iDP-562 User’s Manual
CITIZEN
17
6. Parallel Interface
6.1 Description on Input / Output Signals
(a)
Input signals to printer
DATA 1 …. 8 bit parallel input Data Signal, Logic “1” represent HIGH level.
DATA 2
DATA 3
DATA 4
DATA 5
DATA 6
DATA 7
DATA 8
STB ........This is a strobe for reading-in the data signal. This signal is normally HIGH. The data signal
is clocked-in when STB is made LOW by the host computer.
(b)
Output signals from printer
ACK .......The printer transmits this signal to the host computer after it has received and processed input
data and performed any function commands. This signal indicates that the printer is ready to
receive additional data or function codes. This signal is normally HIGH.
This is activated when signal is LOW. The printer will not transmit this signal when DC3
code is received under SELECT state.
BUSY ......This is an output signal from the printer. When the printer is BUSY state, the signal is HIGH.
FAULT ....This is an output signal from the printer indicating printer FAULT state. The signal is LOW
during a ALARM state. Conditions of Alarm
If home position is not detected within the stipulated period.
If clock pulse is not detected within the stipulated period.
SLCT.......This is an output signal from the printer indicating whether the printer is in a SELECT or
DESELECT state.
The signal is HIGH under the printer is ON-LINE state.
The signal is LOW under the printer is OFF-LINE state
